NEUTRON PUG

Model # PUG-7N([fig] ([fig] PUG-7N) FEATURES:

* DETECTS FAST OR SLOW NEUTRONS

* GAMMA REJECTION TO 100R/hr

* EASY TO CARRY - LESS THAN 9 POUNDS

* OPERATES ON STANDARD D CELLS

* FOUR RANGES

INTRODUCTION: The PUG-7N is a complete fast-slow neutron
monitor. It includes the PUG-7N, four-range survey meter
with attached detection system. Ranges are 0-500; 5,000;
50,000; and 500,000 cpm. Detection system includes PNS-20
plus moderator with polyethylene inner sleeve and cadmium
outer shield.

DESCRIPTION: The PUG-7N, or "Neutron
PUG" detects fast or slow neutrons by means of a thermal
neutron scintillation detector and a moderator. When the
detector (Model # PNS-20) is external to the moderator,
thermal neutrons are detected and measured by means of counts
produced in the scintillator as read on the meter of the
PUG instrument.

The polyethylene moderator is surrounded by a cadmium shield.
The cadmium shield absorbs thermal neutrons and allows other
neutrons to enter the moderator. The moderator "thermalizes"
the entering neutrons thus allowing them to affect the scintillator.
When the thermal neutron detector is within the moderator,
thermal neutrons are excluded by the cadmium layers and
the detector measures only fast neutrons which have entered
the moderator and been "thermalized".
(See also the specification sheets on the PUG-7N survey
meter and PNS-20 probe.)

SPECIFICATIONS:

Class: Portable - Survey meter used with moderator and probe.

Principle of Operation: Boron - 10 in
ZnS (Ag) scintillator matrix (neutron, alpha reaction) and
photomultiplier tube, polyethylene moderator.

Energy: Epithermal to fast (Probe in moderator) 
Thermal (Probe removed from moderator)

PNS-20 Probe Size: 2"
diameter x 8" L

Moderator Size: Approximately 5"
diameter x 6" L

Weight: 8-3/4 pounds total weight

Shipping Weight: 15 pounds 

Dimensions: 10-1/4" L x 10"
H x 6" W, including handle

Batteries: 2 each 9 Volt transistor battery, Eveready # 1222
or equivalent

Ranges: 0-500; 5,000; 50,000; 500,000 cpm
Corresponds with 0-8; 80; 800; 8,000 thermal neutrons/cm^{2}/sec.
(Nominal)

Gamma Rejection: Insensitive to gamma in field up to
100R/hr.

Other Probes: Any alpha, beta or gamma probes of the
P and PS series can be used with this electronics by unplugging
and plugging in their BNC connector and cable.

T_{\textrm{A}}                                   TECHNICAL ASSOCIATES                                   
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  7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103   


$Revision: 1.2 $